/
externalize.ts
158 lines (137 loc) · 3.37 KB
/
externalize.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
import { existsSync } from 'node:fs'
import { isNodeBuiltin, isValidNodeImport } from 'mlly'
import type { DepsHandlingOptions } from './types'
import { slash } from './utils'
const KNOWN_ASSET_TYPES = [
// images
'png',
'jpe?g',
'jfif',
'pjpeg',
'pjp',
'gif',
'svg',
'ico',
'webp',
'avif',
// media
'mp4',
'webm',
'ogg',
'mp3',
'wav',
'flac',
'aac',
// fonts
'woff2?',
'eot',
'ttf',
'otf',
// other
'webmanifest',
'pdf',
'txt',
]
const ESM_EXT_RE = /\.(es|esm|esm-browser|esm-bundler|es6|module)\.js$/
const ESM_FOLDER_RE = /\/(es|esm)\/(.*\.js)$/
const defaultInline = [
/virtual:/,
/\.[mc]?ts$/,
// special Vite query strings
/[?&](init|raw|url|inline)\b/,
// Vite returns a string for assets imports, even if it's inside "node_modules"
new RegExp(`\\.(${KNOWN_ASSET_TYPES.join('|')})$`),
]
const depsExternal = [
/\.cjs\.js$/,
/\.mjs$/,
]
export function guessCJSversion(id: string): string | undefined {
if (id.match(ESM_EXT_RE)) {
for (const i of [
id.replace(ESM_EXT_RE, '.mjs'),
id.replace(ESM_EXT_RE, '.umd.js'),
id.replace(ESM_EXT_RE, '.cjs.js'),
id.replace(ESM_EXT_RE, '.js'),
]) {
if (existsSync(i))
return i
}
}
if (id.match(ESM_FOLDER_RE)) {
for (const i of [
id.replace(ESM_FOLDER_RE, '/umd/$1'),
id.replace(ESM_FOLDER_RE, '/cjs/$1'),
id.replace(ESM_FOLDER_RE, '/lib/$1'),
id.replace(ESM_FOLDER_RE, '/$1'),
]) {
if (existsSync(i))
return i
}
}
}
const _defaultExternalizeCache = new Map<string, Promise<string | false>>()
export async function shouldExternalize(
id: string,
options?: DepsHandlingOptions,
cache = _defaultExternalizeCache,
) {
if (!cache.has(id))
cache.set(id, _shouldExternalize(id, options))
return cache.get(id)!
}
async function _shouldExternalize(
id: string,
options?: DepsHandlingOptions,
): Promise<string | false> {
if (isNodeBuiltin(id))
return id
// data: should be processed by native import,
// since it is a feature of ESM
if (id.startsWith('data:'))
return id
id = patchWindowsImportPath(id)
// always externalize Vite deps, they are too big to inline
if (options?.cacheDir && id.includes(options.cacheDir))
return id
if (matchExternalizePattern(id, options?.inline))
return false
if (matchExternalizePattern(id, options?.external))
return id
const isNodeModule = id.includes('/node_modules/')
const guessCJS = isNodeModule && options?.fallbackCJS
id = guessCJS ? guessCJSversion(id) || id : id
if (matchExternalizePattern(id, defaultInline))
return false
if (matchExternalizePattern(id, depsExternal))
return id
const isDist = id.includes('/dist/')
if ((isNodeModule || isDist) && await isValidNodeImport(id))
return id
return false
}
function matchExternalizePattern(id: string, patterns?: (string | RegExp)[] | true) {
if (patterns == null)
return false
if (patterns === true)
return true
for (const ex of patterns) {
if (typeof ex === 'string') {
if (id.includes(`/node_modules/${ex}/`))
return true
}
else {
if (ex.test(id))
return true
}
}
return false
}
function patchWindowsImportPath(path: string) {
if (path.match(/^\w:\\/))
return `file:///${slash(path)}`
else if (path.match(/^\w:\//))
return `file:///${path}`
else
return path
}